EP0024976B1 - Device for adjusting the inclination between two members, more particularly the two members of a vehicle seat - Google Patents

Device for adjusting the inclination between two members, more particularly the two members of a vehicle seat Download PDF

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Publication number
EP0024976B1
EP0024976B1 EP80401183A EP80401183A EP0024976B1 EP 0024976 B1 EP0024976 B1 EP 0024976B1 EP 80401183 A EP80401183 A EP 80401183A EP 80401183 A EP80401183 A EP 80401183A EP 0024976 B1 EP0024976 B1 EP 0024976B1
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EP
European Patent Office
Prior art keywords
pawl
characterized
teeth
cam
device according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80401183A
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German (de)
French (fr)
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EP0024976A1 (en
Inventor
François Fourrey
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Peugeot Cycles SA
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Peugeot Cycles SA
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Publication date
Priority to FR7921244 priority Critical
Priority to FR7921244A priority patent/FR2463596B1/fr
Application filed by Peugeot Cycles SA filed Critical Peugeot Cycles SA
Publication of EP0024976A1 publication Critical patent/EP0024976A1/en
Application granted granted Critical
Publication of EP0024976B1 publication Critical patent/EP0024976B1/en
Application status is Expired legal-status Critical

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B60N2/2356Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
    • B60N2/2362Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls rotatably movable

Description

  • Les dossiers de sièges de véhicules sont généralement articulés sur l'assise du siège au moyen d'un dispositif comportant une couronne dentée intérieurement, solidaire de l'organe mobile, c'est-à-dire du dossier, et un cliquet portant une denture extérieure et monté pivotant sur la partie fixe c'est-à-dire, dans le cas d'un siège d'automobile, sur l'assise. vehicle seats records are usually hinged to the seat by means of a device comprising a toothed ring integral with the movable member, that is to say the file, and a pawl carrying a toothing outdoor and pivotally mounted on the fixed part that is to say, in the case of an automobile seat, on the seat. Une came maintient le cliquet en prise avec la denture de l'organe mobile et immobilise, par suite, les deux éléments en rotation tandis qu'un levier permet de commander la came et de libérer l'organe mobile. A cam holds the pawl in engagement with the toothing of the movable member and secures, therefore, the two elements in rotation while a lever is used to control the cam and releasing the movable member.
  • De tels dispositifs présentent l'inconvénient de ne pas résister d'une manière suffisante aux efforts brusques contre le dossier et, par suite, de permettre un basculement accidentel de ce dernier, ce qui est dangereux pour l'utilisateur. Such devices have the disadvantage of not withstand a manner sufficient to sudden efforts against file and, consequently, allow accidental tipping over, which is dangerous for the user.
  • Par ailleurs, la nécessité de donner à l'axe de pivotement du clapet un diamètre suffisant pour qu'il puisse supporter seul les efforts appliqués à l'organe mobile, conduit à placer cet axe largement à l'intérieur de la couronne dentée de l'organe mobile, ce qui oblige à adopter soit une denture de cliquet engageante qui nécessite un mouvement de rotation de l'organe mobile pour obtenir le verrouillage ou le déverrouillage de l'articulation, soit une denture de cliquet très inclinée, et par conséquent peu résistante, si on veut s'affranchir de ce défaut. Moreover, the need to give to the valve pivot axis a sufficient diameter for it to bear only the forces applied to the movable member, leads to widely put this axis within the ring gear of movable member, forcing to adopt either a toothing engaging pawl which requires a rotational movement of the movable member for the locking or unlocking of the articulation, a ratchet toothing very inclined, and therefore little resistant, if we want to overcome this defect. Un exemple de dispositif de ce type est décrit dans le brevet FR-A-1.347.823. An exemplary device of this type is disclosed in FR-A-1347823.
  • Pour renforcer l'articulation on a proposé de combiner la came de verrouillage avec une came de commande et, en outre, de placer des surfaces d'arrêt de part et d'autre du cliquet pour limiter les possibilités de déplacement radial de ce dernier. To strengthen the joint has been proposed to combine the locking cam with a control cam and, further, to place part of stop surfaces and the other of the pawl to limit the possibilities for radial movement thereof. Par exemple, le dispositif décrit dans le brevet FR-A-2.364.784 comporte un flasque fixe muni d'un logement circulaire, un flasque mobile solidaire d'une couronne dentée intérieurement, s'emboîtant dans le logement du flasque fixe et, entre les flasques, au moins un cliquet pivotant qui présente une forme générale incurvée, de rayon inférieur à celui de la couronne dentée, et des faces latérales extrêmes en arc de cercle, et qui porte une portion de denture en regard de la couronne dentée, à chaque extrémité du cliquet un relief en saillie sur le fond du logement, qui présente des faces de forme correspondant à celles du cliquet, et une came mobile entre une position de verrouillage de l'articulation dans laquelle elle maintient la denture en prise avec la couronne dentée, et une position de réglage dans laquelle elle libère la denture pour permettre le déplacement relatif des flasques. For example, the device described in patent FR-A-2364784 comprises a fixed plate provided with a circular housing, a movable plate secured to a toothed ring, fitting into the housing of the fixed flange and between the flanges, at least a pivotal pawl which has a generally curved shape of radius less than that of the toothed ring, and end lateral surfaces in a circular arc, and which carries a portion of teeth facing the toothed ring in each end of the pawl a relief projecting from the bottom of the housing, which has the form of faces corresponding to those of the pawl, and a cam movable between an articulation locking position wherein it maintains the teeth meshing with the ring gear toothed, and an adjustment position in which it releases the set of teeth to allow the relative movement of the flanges.
  • On réalise donc ainsi un dispositif complexe sans supprimer totalement les risques de détérioration des pièces quie le constituent, lors d'un choc brusque accidentel sur le dossier, et sans supprimer l'apparition dans l'articulation du jeu dû à un dimensionnement insuffisant de l'axe de cliquet. It therefore carries as a complex device without completely remove the risk of deterioration of parts quie composed, in a sudden accidental impact on the record, and without removing the appearance in the joint of the game due to insufficient dimensioning of axis pawl.
  • La présente invention a donc pour but de remédier à ces inconvénients en réalisant un dispositif d'articulation de conception simple, qui présente une grande robustesse et supprime efficacement tout risque de déplacement accidentel du cliquet et donc de déverrouillage de l'articulation. The present invention therefore aims to remedy these drawbacks by providing a simple design of the hinge device, which has high strength and effectively eliminates any risk of accidental movement of the ratchet and thus unlock the joint.
  • Cette invention a en effet pour objet un dispositif du type ci-dessus, qui comporte au moins trois reliefs qui délimitent trois surfaces de guidage du pivotement du cliquet, qui sont coaxiales et ont leur centre commun situé sur la périphérie du logement, ou même à l'extérieur de celui-ci, et qui sont constamment en contact respectivement avec trois faces latérales en arc de cercle du cliquet, qui ont le même centre et sont voisines, respectivement, du sommet et des extrémités du cliquet de sorte que ce dernier est maintenu uniquement par emboîtement entre les reliefs et la came et, sous l'action de cette dernière, glisse sur les surfaces de pivotement et pivote autour d'un axe fictif passant par leur centre, entre les positions de verrouillage et de déverrouillage. This invention therefore relates to a device of the above type, which comprises at least three reliefs which define three guiding surfaces of the pivoting of the pawl which are coaxial and have their common center located on the periphery of the housing, or even outside thereof, and which are constantly in contact respectively with three lateral faces arcuate pawl, which have the same center and are adjacent, respectively, the top and ends of the pawl so that the latter is maintained solely by engagement between the reliefs and the cam and, under the action of the latter, slides on the pivoting surfaces and pivots about an imaginary axis passing through their center, between the locking and unlocking positions.
  • Le cliquet étant ainsi simplement maintenu entre les reliefs, sans l'intervention d'aucun axe de fixation sur le flasque, et restant constamment en contact avec ces reliefs et avec la came, non seulement le dispositif ne comporte plus aucune pièce susceptible de se rompre sous l'effet d'un choc ou autre effort brutal, mais le déplacement accidentel du cliquet est pratiquement interdit. The pawl being thus simply held between the reliefs, without the intervention of any attachment axis on the flange, and remaining constantly in contact with these reliefs and with the cam, not only the device no longer has any parts rupturable under the effect of a shock or other brutal effort, but the accidental movement of the ratchet is virtually prohibited. Les reliefs sont, en effet, d'une seule pièce avec le flasque fixe ce qui permet de créer des surfaces de réaction nettement plus importantes, plus précises et plus solidaires du flasque fixe que celles obtenues par un axe rapporté, et également de faire tourillonner le cliquet autour d'un axe fictif situé à proximité de la couronne dentée, et de donner aux dentures une inclinaison faible, donc une meilleure résistance aux efforts tangentiels appliqués à celle-ci. The reliefs are in fact in one piece with the fixed flange thereby create reaction surfaces substantially larger, more accurate and integral with the fixed flange as those obtained by an insert axis, and also to journalling the pawl around a fictitious axis located close to the ring gear, and giving teeth a small inclination, so a better resistance to tangential forces applied thereto.
  • La description ci-dessous d'un mode de réalisation donnée à titre d'exemple non limitatif, et représenté aux dessins annexés, fera d'ailleurs ressortir les avantages et caractéristiques de l'invention. The description below of an embodiment given by way of non-limiting example and shown in the accompanying drawings, will bring out the advantages and features of the invention.
  • Sur ces dessins: In these drawings:
    • - la Fig. - Fig. 1 est une vue de côté d'un dispositif d'articulation selon l'invention; 1 is a side view of a hinge device according to the invention;
    • - la Fig. - Fig. 2 est une vue, partie en vue extérieure, partie en coupe, suivant la ligne 2-2 de la figure 1; 2 is a view, partly in external view, partly in section, along line 2-2 of Figure 1;
    • - la Fig. - Fig. 3 est une vue de côté du dispositif de l'articulation avant la mise en place du flasque mobile, les cliquets et la came étant représentés en position déverrouillée; 3 is a side view of the hinge device prior to implementation of the mobile flange, the pawls and the cam being shown in the unlocked position;
    • - la Fig. - Fig. 4 est une vue analogue à la figure 3, montrant les cliquets et la came en position de verrouillage; 4 is a view similar to Figure 3 showing the pawls and the cam in the locking position;
    • - la Fig. - Fig. 5 est une vue en plan de la came de verrouillage des cliquets; 5 is a plan view of the pawl lock cam;
    • - la Fig. - Fig. 6 est une vue en plan d'un cliquet; 6 is a plan view of a pawl;
    • - la Fig. - Fig. 7 est une vue en coupe suivant la ligne 7-7 d'une portion du flasque fixe portant le pontet de guidage des cliquets; 7 is a sectional view along line 7-7 of a portion of the fixed flange with the guide bridge pawls;
    • - la Fig. - Fig. 8 est une vue en coupe suivant la ligne 8-8 de ce même pontet. 8 is a sectional view taken along line 8-8 of the same bridge.
  • Comme le montrent les dessins, le dispositif d'articulation de l'invention comporte deux flasques 1 et 2, destinés à être fixés respectivement à la partie mobile et à la partie fixe de l'articulation, c'est-à-dire, dans le cas d'un siège de véhicule automobile, au dossier et à l'assise de ce siège. As shown in the drawings, the inventive joint device comprises two flanges 1 and 2, intended to be fixed respectively to the movable part and the fixed part of the joint, that is to say, in the case of a motor vehicle seat, the backrest and seat of the seat. Le flasque 1 qui est mobile, c'est-à-dire fixé au dossier du siège, comporte autour d'une ouverture circulaire une couronne dentée intérieurement 4, qui est légèrement décalée latéralement et délimite ainsi une portée circu-- laire extérieure 5. The flange 1, which is movable, that is to say fixed to the seat back comprises around a circular opening an internally toothed ring 4, which is slightly offset laterally and thus defines an outer circular surface 5.
  • Le flasque fixe 2 destiné à être rendu solidaire de l'assise du siège comporte, lui, un logement circulaire 7 ayant un diamètre sensiblement égal à celui de la portée 5 du flasque 1 et destiné à recevoir la couronne dentée 4, ainsi que le montre la figure 2. Le logement du flasque 2 est fermé par un fond 8, qui est percé d'un orifice central 10 entouré par un tube 12, autour duquel est enroulé un ressort hélicoïdal 14 dont les extrémités sont fixées respectivement sur les flasques 1 et 2 et qui tend à rapprocher les extrémités extérieures de ces flasques l'une de l'autre, c'est-à-dire à rapprocher le dossier de l'assise. The fixed flange 2 intended to be secured to the seat cushion comprises it, a circular seat 7 having a diameter substantially equal to that of surface 5 of the flange 1 for receiving the ring gear 4, as shown by Figure 2. the housing of the flange 2 is closed by a bottom 8 which is pierced by a central hole 10 surrounded by a tube 12, around which is wound a helical spring 14 whose ends are fixed respectively to the flanges 1 and 2 and which tends to bring the outer ends of these flanges from one another, that is to say to bring the backrest of the seat.
  • Le fond 8 du logement du flasque 2 comporte des parties embouties formant plusieurs reliefs, quatre dans le mode de réalisation représenté, respectivement 16, 18, 20 et 22, qui font saillie à l'intérieur de ce logement. The bottom 8 of the housing of the flange 2 comprises stamped portions reliefs several, four in the embodiment shown, respectively 16, 18, 20 and 22, which protrude inside the housing. Ces reliefs sont symétriques deux à deux par rapport au centre du logement 7 et de la couronne dentée 4. Ainsi les deux reliefs 16 et 20, diamétralement opposés, sont délimités latéralement par deux surfaces en arc de cercle, centrées respectivement en des points 0 et 0 1 situés à proximité de la périphérie du logement 7, légèrement à l'intérieur ou éventuellement à l'extérieur de celui-ci. These reliefs are symmetrical in pairs relative to the center housing 7 and the ring gear 4. Thus, the two reliefs 16 and 20, diametrically opposed, are delimited laterally by two circular arc surfaces centered respectively at points 0 and 0 1 close to the periphery of the housing 7, slightly inside or possibly outside thereof. Les deux reliefs, 18 et 22, ont des formes générales en portions de circonférence, coaxiales à l'évidement 7, délimitées en regard des reliefs 16 et 20 par des surfaces latérales coaxiales à ces demi-bossages. The two reliefs 18 and 22, have general forms circumferential portions, coaxial with the recess 7, delimited opposite the reliefs 16 and 20 by coaxial side surfaces of these half-lobes.
  • Comme le montrent plus clairement les figures 3, 4, 7 et 8, en regard du relief 16 les reliefs ou pontets 18 et 22 sont délimités par une surface incurvée, respectivement 23 et 24, qui est coaxiale à la surface latérale du relief 16, c'est-à-dire centrée au point 0. De la même manière, à leur autre extrémité ces pontets 18 et 22 sont délimités par une surface latérale incurvée, respectivement 25 et 26, centrée sur le point 0 1 c'est-à-dire coaxiale au demi-bossage 20. As more clearly shown in Figures 3, 4, 7 and 8, compared with the relief 16 reliefs or bridges 18 and 22 are delimited by a curved surface, respectively 23 and 24, which is coaxial with the lateral surface of the relief 16, that is to say centered at 0. Similarly, at the other end these bridges 18 and 22 are delimited by a curved side surface, respectively 25 and 26, centered on the point 0 1 that is -dire coaxial to the half boss 20.
  • Entre chacun des reliefs ou demi-bossages 16 et 20 et les deux pontets voisins, respectivement 22 et 18, est monté un cliquet 28 qui est emboîté entre les trois surfaces coaxiales respectivement 16, 23 et 24 ou 20, 25 et 26,-et glisse sur ces surfaces. Between each of the protrusions or half dimples 16 and 20 and the two neighboring bridges, respectively 22 and 18, there is mounted a pawl 28 which is fitted between the three coaxial surfaces respectively 16, 23 and 24 or 20, 25 and 26, -and slides over these surfaces. En effet, comme le montre plus clairement la figure 6, chacun des cliquets 28 a une forme générale en arc de cercle et comporte au voisinage de sa partie centrale, c'est-à-dire de son sommet, un évidement 30 en arc de cercle ayant un rayon et une dimension analogues à ceux du demi-bossage 16 ou 18. De part et d'autre de cet évidement 30 le cliquet 28 comporte deux bras de dimensions inégales, respectivement 31 et 32, qui sont chacun terminés par une surface incurvée, respectivement 33 et 34, qui est coaxiale à la paroi de l'évidement 30, et dont les rayons sont respectivement sensiblement égaux aux rayons 25 et 23 des reliefs de guidage. Indeed, as shown more clearly in Figure 6, each of the pawls 28 has a general shape of a circular arc and comprises, near its central part, that is to say its top, a recess 30 in an arc of circle having a radius and a similar dimension to those of the half boss 16 or 18. on both sides of this recess 30 the pawl 28 has two arms of unequal dimensions, respectively 31 and 32, which are each terminated by a surface curved, respectively 33 and 34, which is coaxial with the wall of the recess 30 and whose radii are respectively substantially equal to 25 rays 23 and guide reliefs. Le grand bras 32 porte une portion de denture 36 susceptible de venir en prise avec la denture de la couronne 4 du flasque mobile 1, tandis que le petit bras 31 est lisse. The large arm 32 carries a toothed portion 36 capable of coming into engagement with the toothing of the crown 4 of the mobile flange 1, while the small arm 31 is smooth.
  • Ce cliquet n'est pas lié au flasque mais est seulement solidement maintenu par les reliefs qui sont tous d'une seule pièce avec le flasque fixe. This catch is not bound to the plate but is only held securely by the reliefs which are all of a piece with the fixed flange. En effet les reliefs en contact avec les extrémités du cliquet sont constitués par des pontets dont les surfaces incurvées et même cylindriques 23 à 25 en contact avec le cliquet sont réalisées par découpage, tandis que les parties concentriques à l'axe de l'articulation sont raccordées au flasque fixe par des soyages obtenus par emboutissage; Indeed the reliefs in contact with the ends of the pawl are formed by bridges which cylindrical curved surfaces and even from 23 to 25 in contact with the pawl are formed by cutting, while the concentric parts to the axis of the joint are connected to the fixed flange by dimplings obtained by stamping; le relief 16, 20 en contact avec la partie centrale du cliquet est contitué par un demi-bossage, dont une partie présente un plan cylindrique de contact avec le cliquet, et dont l'autre côté est constitué d'un soyage concentrique à l'axe d'articulation, assurant la liaison de la partie relevée avec le flasque fixe. the relief 16, 20 in contact with the central portion of the pawl is contitué by half a boss part of which has a cylindrical plane of contact with the ratchet, and another side of which consists of a concentric joggle in hinge pin, ensuring the connection of the standing part with the fixed flange. Le rayon de courbure de l'ensemble du cliquet 28 est inférieur à celui du logement 7 ou de la couronne dentée 4 de sorte que les deux bras 31 et 32 ne peuvent pas être simultanément en contact avec la couronne dentée 4. Bien entendu l'espace entre la surface extérieure de chacun des reliefs et le bord du logement 7 correspond sensiblement à la largeur de la couronne dentée 4, qui peut se placer entre eux. The radius of curvature of all of the pawl 28 is smaller than that of the housing 7 or the ring gear 4 so that both arms 31 and 32 can not be simultaneously in contact with the ring gear 4. Of course the space between the outer surface of each of the relief and the edge of the housing 7 corresponds substantially to the width of the ring gear 4, which can be placed between them.
  • Sur la face opposée à l'évidement 30, le cliquet 28 comporte un autre évidement 38 qui est profilé de telle manière que les extrémités du cliquet sont élargies et forment deux butées dirigées vers l'intérieur, tandis que la paroi de l'évidement 38 forme plusieurs courbes ou surfaces d'appui pour une came 40 de commande de ce cliquet. On the side opposite to the recess 30, the pawl 28 has a further recess 38 which is shaped such that the ends of the pawl are widened and form two abutments directed inwardly, while the wall of the recess 38 forms several curves or bearing surfaces for a cam 40 of the control pawl.
  • Dans le mode de réalisation représenté, la came 40 étant destinée à déplacer deux cliquets 28, comporte deux lobes diamétralement opposés, respectivement 41 et 42, de largeur relativement importante, et entre ces lobes deux renflements arrondis, respectivement 43 et 44, de profondeur nettement inférieure à celle des lobes 41 et 42. In the embodiment shown, the cam 40 being adapted to move two pawls 28, has two diametrically opposed lobes, 41 and 42 respectively, of relatively large width, and between these two rounded bulges lobes, 43 and 44, of depth substantially lower than that of the lobes 41 and 42.
  • La came 40 est percée en son centre d'un trou carré 46 permettant le passage de l'extrémité, de section carrée, d'un levier 48 de commande de la manoeuvre de l'articulation. The cam 40 is pierced at its center with a square hole 46 for the passage of the end, of square section, 48 a control lever for actuating the articulation. Un ressort 50, enroulé en hélice à l'intérieur du tube 12 solidaire du flasque fixe 2 et fixé d'une part à ce tube 12 et d'autre part à la came 40, rappelle cette came dans la position d'immobilisation de l'articulation. A spring 50, wound helically inside the tube 12 integral with the fixed flange 2 and fixed firstly to the tube 12 and secondly to the cam 40, is in this cam in the position of immobilization of 'joint.
  • Cette position d'immobilisation est représentée sur la figure 4, qui montre que la came 40 est alors en appui par chacun de ses lobes 41 et 42 sur une rampe incurvée 52 de chacun des cliquets 28. La portion de denture 36 est alors en prise avec la couronne dentée 4 du flasque mobile 1. Par ailleurs les trois surface coaxiales du cliquet 28 sont en contact étroit avec les trois surfaces coaxiales, respectivement des reliefs 18, 22 et 16 ou 20. Les flasque mobile 1. Par ailleurs les trois surfaces c'est-à-dire immobilisés. This stop position is shown in Figure 4, which shows that the cam 40 is then supported by each of its lobes 41 and 42 on a curved ramp 52 of each of the pawls 28. The tooth portion 36 is then engaged with the ring gear 4 of the movable flange 1. Furthermore the three coaxial surface of the pawl 28 are in close contact with the three coaxial surfaces, respectively, reliefs 18, 22 and 16 or 20. the movable flange 1. Furthermore the three surfaces that is to say immobilized.
  • Dans une telle position tout effort exercé sur le flasque 1, indiqué en trait interrompu sur la figure 4, et tendant à rapprocher ce flasque 1 du flasque fixe 2, a pour effet de serrer davantage le cliquet 28 contre la surface 26 ou 23 du pontet 18 ou 22 voisin. In such position while force exerted on the flange 1, as shown in broken lines in Figure 4, and tending to bring this flange 1 of the fixed flange 2, has the effect of further tighten the pawl 28 against the surface 26 or 23 of the bridge 18 or 22 neighbor. Un tel effort applique en outre ce cliquet contre la came 40 en la repoussant en direction de l'autre cliquet, c'est-à-dire en renforçant le contact entre ces organes. Such an effort further applies it against the cam pawl 40 by the pushing in the direction of the other pawl, that is to say by increasing the contact between these bodies. Un effort exercé sur le flasque 1 en sens inverse aurait un effet analogue puisqu'il appliquerait le cliquet 28 sur les surfaces 24, 25 des pontets adjacents. A force exerted on the flange 1 in the opposite direction would have a similar effect as would apply the pawl 28 on the surfaces 24, 25 of adjacent bridges.
  • Lorsque le dossier du siège, c'est-à-dire le flasque mobile 1, doit être déplacé le levier 48 est actionné pour faire pivoter la came 40 entre la position représentée sur la figure 4 et celle représentée sur la figure 3. Au cours de ce pivotement les lobes, respectivement 41 et 42, de la came 40, viennent buter contre l'extrémité de la surface 33 du petit bras 31 de chacun des cliquets 28 et repoussent ce petit bras 31 en direction de la couronne dentée 4. Le cliquet 28 pivote alors sur le demi-bossage 16 ou 20 et le long des surfaces 24 et 23, ou 25 et 26, coaxiales à ce demi-bossage. When the seat back, that is to say the mobile flange 1 must be moved the lever 48 is operated to rotate the cam 40 between the position shown in Figure 4 and that shown in Figure 3. During this pivoting lobes, 41 and 42 respectively, of the cam 40, abut against the end of the surface 33 of the small arm 31 of each of the pawls 28 and push the small arm 31 toward the ring gear 4. the pawl 28 then rotates the half boss 16 or 20 and along the surfaces 24 and 23, or 25 and 26, coaxial with the half-boss. Au cours de ce pivotement l'extrémité de la surface 28 vient buter contre le renflement 43 ou 44 de la came 40, tandis que chacun des lobes 41 et 42 entre en contact avec le fond de l'évidement 38 de ce même cliquet. During this pivoting of the end surface 28 abuts against the bulge 43 or 44 of the cam 40, while each of the lobes 41 and 42 come into contact with the bottom of the recess 38 of the same pawl. La came 40 est ainsi en contact en trois points avec la paroi de l'évidement 38 de chacun des cliquets 28, ce qui assure une immobilisation parfaite de ces organes les uns par rapport aux autres. The cam 40 is thus in three point contact with the wall of the recess 38 of each of the pawls 28, which ensures perfect immobilization of these bodies to each other. Par contre, la portion de denture 36 est dégagée de la couronne dentée 4 et le flasque mobile 1 peut être déplacé librement autour de l'ensemble formé par les cliquets et les reliefs et être amené dans la position désirée. For against, the portion of teeth 36 is disengaged from the ring gear 4 and the mobile plate 1 can be freely moved around the assembly formed by the pawls and the reliefs and be brought into the desired position.
  • Une fois cette position choisie, le levier 48 peut être relâché et le ressort 50 ramène automatiquement la came 40 dans la position de verrouillage représentée sur la figure 4. Once this selected position, the lever 48 can be released and the spring 50 automatically returns the cam 40 in the locking position shown in Figure 4.
  • Bien entendu le logement 7 est fermé, sur sa face opposée au flasque mobile 1, par une plaque de retenue 54 (fig. 2), qui est de préférence soudée en différents points sur les reliefs 16, 18, 20 et 22. De cette manière les cliquets 28 sont emprisonnés latéralement entre cette plaque de retenue 54 et le fond du logement 7 du flasque 2. Ils sont en outre emboîtés entre les trois surfaces coaxiales des reliefs de ce logement et la came 40 qui les commande. Of course the housing 7 is closed, on its face opposite the movable flange 1 by a retaining plate 54 (Fig. 2), which is preferably welded at different points on the reliefs 16, 18, 20 and 22. In this so the pawls 28 are laterally trapped between this retainer plate 54 and the bottom of the housing 7 of flange 2. They are further nested between three reliefs coaxial surfaces of this housing and the cam 40 which controls them. Les reliefs étant d'une seule pièce avec le flasque 2, tandis que les cliquets eux, ne sont liés à ce flasque par aucun organe susceptible d'être rompu et qu'en outre il n'est prévu dans ce dispositif aucune lumière, ni autre élément d'affaiblissement, l'ensemble de l'articulation présente une grande robustesse et une grande résistance contre les efforts soudains, accidentels ou non, exercés sur le dossier c'est-à-dire sur le flasque mobile 1. The reliefs being in one piece with the flange 2, while the pawls them are not related to this flange by any member may be broken and moreover it is not provided in this device no light, or other attenuation member, the entire joint has a high strength and high resistance against sudden effort, accidental or not exerted on the record that is to say on the mobile flange 1.
  • Le fonctionnement de l'articulation reste cependant aussi simple que celui des articulations habituelles, tandis que sa réalisation est nettement moins complexe et peut être effectuée à un coût relativement faible. The operation of the articulation, however, remains as simple as that of normal joints, while its construction is significantly less complex and can be performed at a relatively low cost.

Claims (9)

1. A pivot device between the cushion and the backrest of a seat, and in particular a motor vehicle seat, or the like, comprising a fixed side wall (2) provided with a circular recess, a movable side wall (1) connected to an internally toothed ring (4) which is fitted in the recess (7) of the fixed side wall and, between the side walls, at least a pivotal pawl (28) which has a generally curved shape whose radius is less than that of the toothed ring, and end lateral surfaces in the shape of an arc of a circle (30, 33, 34), and which carries a portion of a set of teeth (36) in confronting relation to the toothed ring, at each end of the pawl a projection (16, 18, 20, 22) projecting from the bottom of the recess which has surfaces of a shape corresponding to those of the pawl, and a cam (40) movable between a position for locking the pivot in which it maintains the set of teeth (36) engaged with the toothed ring, and an adjusting position in which it releases the set of teeth in order to allow the relative displacement of the side walls, characterized in that it comprises at least three projections (16, 18, 20, 22) which define three guiding surfaces (16, 23, 24, 20, 25, 26) for the pivoting of the pawl (28) which are coaxial and have their common centre (0, 0,) located on the periphery of the recess, or even outside the latter, and which are constantly in contact respectively with the three lateral surface in the shape of an arc of a circle (30, 33, 34) of the pawl, which have the same centre and are respectively in the neighbourhood of the apex and the ends of the pawl so that the latter is maintained solely by a fitting between the projections and the cam and, under the action of the latter, slides on the pivoting surfaces and pivots about an imaginary axis passing through their centre (0, 0,) between the locking and unlocking positions.
2. A device according to claim 1, characterized in that the central projection (16) of the fixed side walls is defined by a lateral surface in the shape of a portion of a circle which cooperates with a cavity (30) of complementary shape formed in the outer surface of the pawl (28) in the vicinity of the portion of the set of teeth (36).
3. A device according to claim 2, characterized in that each pawl (28) has, on each side of the cavity (30), respectively a long arm (32) having external teeth, and a shorter arm (31).
4. A device according to one of the claims 1-3, characterized in that the pawl (28) has, on its side opposed to the set of teeth (36), a cavity (38) whose wall is profiled and forms a plurality of successive curves, while the ends of the pawl are widened.
5. A device according to one of the claims 1-4, characterized in that the projections (16, 18, 20, 22) are all remote from the periphery of the recess (7) by a distance substantially equal to the width of a toothed ring (4) of the movable side wall (2).
6. A device according to one of the claims 1-5, characterized in that the cam (40) controlling the pawl has at least one large lobe (41, 42) and a rounded lateral enlargement (43, 44) which is thinner than the lobe, the end of the pawl adjacent to the set of teeth bearing against this enlargement when the lobe urges the other end of the pawl for the purpose of releasing the toothed ring.
7. A device according to one of the claims 1-6, characterized in that it comprises four projections (16, 18, 20, 22) which are symmetrical in pairs relative to the centre of the recess (7), two pawls (28) pivoting between said projections, and a control cam (40) having two diametrically opposed large lobes (41, 42) and two rounded enlargements (43, 44) which are disposed also in diametrically opposed relation between these two lobes.
8. A device according to one of the claims 6 and 7, characterized in that each pawl (28) has a narrow part defined by the internal cavity (38) and the concave pivoting surface (30) and two end abutments extending toward the interior and respectively coming into contact with'the lobe (41) and the enlargement (43) of the cam when unlocking, and between the narrow part and the abutment the closest to the set of teeth (36), a ramp (52) against which the lobe (41) bears for the locking.
9. A device according to one of the claims 1-8, characterized in that the pawl (28) has a thickness in the neighbourhood of the distance between the two side walls (1 and 2) and is maintained therebetween merely by the contact with the pivoting surfaces.
EP80401183A 1979-08-23 1980-08-13 Device for adjusting the inclination between two members, more particularly the two members of a vehicle seat Expired EP0024976B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7921244 1979-08-23
FR7921244A FR2463596B1 (en) 1979-08-23 1979-08-23

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EP0024976A1 EP0024976A1 (en) 1981-03-11
EP0024976B1 true EP0024976B1 (en) 1983-11-02

Family

ID=9229034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401183A Expired EP0024976B1 (en) 1979-08-23 1980-08-13 Device for adjusting the inclination between two members, more particularly the two members of a vehicle seat

Country Status (5)

Country Link
EP (1) EP0024976B1 (en)
DE (1) DE3065466D1 (en)
ES (1) ES251619Y (en)
FR (1) FR2463596B1 (en)
IT (1) IT1129229B (en)

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DE3927738A1 (en) * 1989-08-23 1991-02-28 Brose Fahrzeugteile A device for connection of two gear parts

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DE8208653U1 (en) * 1982-03-26 1986-08-28 P.A. Rentrop, Hubbert & Wagner Fahrzeugausstattungen Gmbh & Co Kg, 3060 Stadthagen, De
FR2578010B1 (en) * 1985-02-26 1987-04-10 Tubauto continuous joint, more especially for seats of land vehicles, air and water
FR2578602B1 (en) * 1985-03-11 1990-05-18 Cousin Cie Ets A & M Freres round joint has discontinuous locking obtained by multiple grains dentes
FR2626154B1 (en) * 1988-01-22 1990-05-18 Tubauto Method and device for locking or releasing the articulation of a seat
FR2642377B1 (en) * 1989-01-31 1991-05-17 Equip Composants Ind Auto Siege reclining and folding backrest
EP0447150A3 (en) * 1990-03-12 1991-12-27 Kitagawa Limited Tilt control means
JP3596034B2 (en) 1994-06-30 2004-12-02 アイシン精機株式会社 Seat reclining device
FR2722150B1 (en) * 1994-07-05 1996-09-27 Cesa Articulation has adjustment position memory for seat
FR2739812B1 (en) * 1995-10-17 1998-03-27 Cesa seat for articulation, and for motor vehicle seat provided with this articulation
EP0776782B1 (en) * 1995-11-30 2001-08-08 Fuji Kiko Co., Ltd. Adjustable hinge mount for seats
FR2756230B1 (en) * 1996-11-22 1999-02-12 Ecia Equip Composants Ind Auto Device for actuating a control member of a mechanism of motor vehicle seat and seat provided with such a device
DE19814225B4 (en) * 1997-04-03 2006-12-28 Keiper Gmbh & Co.Kg Lehneneinstellbeschlag
CA2243166C (en) * 1997-07-15 2006-02-07 Magna Lomason Corporation Ring type recliner
DE19816248C1 (en) * 1998-04-11 1999-10-14 Keiper Gmbh & Co Lean adjuster for motor vehicle backrest
US6312053B1 (en) 1999-07-20 2001-11-06 Magna Interior Systems, Inc. Recliner assembly
DE69908135T2 (en) * 1998-07-28 2004-04-01 Magna Interior Systems Inc., Aurora a recliner
FR2784426B1 (en) * 1998-10-13 2000-12-15 Marc Lefevere Structure for an automatic guiding device indexes of a movable piece
JP4374657B2 (en) * 1999-06-08 2009-12-02 アイシン精機株式会社 Seat reclining device
US6149235A (en) * 1999-08-13 2000-11-21 Lear Corporation Rotary-cam type reclining device
DE60142665D1 (en) * 2000-06-29 2010-09-09 Fuji Kiko Kk Tilt adjustment for a seat
CA2387393C (en) * 2001-05-24 2006-01-03 Fujikiko Kabushiki Kaisha Seat recliner
US8585149B2 (en) 2008-06-02 2013-11-19 Magna Seating Inc Disc recliner with integral travel stops

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FR1250646A (en) * 1959-12-03 1961-01-13 Joint provided with a locking device
FR1347823A (en) * 1962-11-20 1964-01-04 Cousin Freres Sa adjustable self-locking joint, in particular for seats
GB1046893A (en) * 1964-02-21 1966-10-26 Levi Clews Improvements relating to adjustable seats
DE2641582A1 (en) * 1976-09-16 1978-03-23 Keiper Automobiltechnik Gmbh Hinge fitting for vehicle seats with respect to the seat part pivoting backrest
US4082352A (en) * 1977-01-13 1978-04-04 Lear Siegler, Inc. Seat back recliner

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Publication number Priority date Publication date Assignee Title
DE3927738A1 (en) * 1989-08-23 1991-02-28 Brose Fahrzeugteile A device for connection of two gear parts

Also Published As

Publication number Publication date
ES251619Y (en) 1981-04-01
IT8067999D0 (en) 1980-06-26
EP0024976A1 (en) 1981-03-11
FR2463596A1 (en) 1981-02-27
ES251619U (en) 1980-11-01
FR2463596B1 (en) 1983-07-22
DE3065466D1 (en) 1983-12-08
IT1129229B (en) 1986-06-04

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